Overshadow (7)
'overshadow' is the definition.
(eclipsing is a kind of overshadowing)
This is the entire clue.
(Other definitions for eclipse that I've seen before include "Heavenly phenomenon" , "Heavenly obscuration" , "Ennui" , "Deprive of prominence" , "Over-shadow as the earth may the moon" .)
'overshadow' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for dominate that I've seen before include "Tower over" , "Rule" , "corner" , "Command, control" , "Govern" .)